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1865 C. B. Mansfield Theory of Salts 45 An Oxybase bears to the general idea of a salt and to Oxygen a relation just the converse of that which a Hydrostyle bears to that idea and to Hydrogen. The term Oxybase includes the Alkalies, commonly so called.

1883 Science 13 Apr. 283/1 Nitrogen is eliminated by the action of nitrous acid with the formation of an oxy-base, C₉H₁₃N₂(OH) (oxykyanconiine).

1960 Jrnl. Org. Chem. 25 636/2 Electropherograms..showed the presence of small amounts of oxy base C₁₉H₂₆N₂O.